Instrumented prosthesis for knee implants monitoring

Arami, Arash; Simoncini, Matteo; Atasoy, Oğuz; Hasenkamp, Willyan; Ali, Shafqat; Bertsch, Arnaud; Meurville, Eric; Tanner, Steve; Dejnabadi, H.; Leclercq, Vincent; Renaud, Philippe; Dehollain, Catherine; Farine, Pierre-André; Jolles, Brigitte M.; Aminian, Kamiar; Ryser, Peter

doi:10.1109/case.2011.6042490

Cited by 15 publications

(7 citation statements)

References 15 publications

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“…It guarantees minimal change in the prostheses PE while reduces wireless connection problems, and better fulfills energy harvesting constraints. However, this study did not address the remote powering, electronics and communication issues; study of these issues is in progress while the concept feasibility has been shown recently (Arami et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

“…IE was generated with the prosthesis using the knee mechanical simulator (Arami et al, 2011) equipped with reflective markers (Fig. 3a).…”

Section: Validationmentioning

confidence: 99%

“…However current works on the instrumented prostheses mainly focused on force and moment measurements (Kutzner et al, 2010;D'Lima et al, 2008), and were not designed for in-vivo kinematic measurements. Recently, we introduced the general concept of an instrumented prosthesis including sensors, electronics and remote powering for both force and kinematics measurements; however the kinematics were restricted to the abduction-adduction and flexion-extension rotations (Arami et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Accurate internal–external rotation measurement in total knee prostheses: A magnetic solution

Arami

Miehlbradt

Aminian

2012

Journal of Biomechanics

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Section: Discussionmentioning

confidence: 99%

“…IE was generated with the prosthesis using the knee mechanical simulator (Arami et al, 2011) equipped with reflective markers (Fig. 3a).…”

Section: Validationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Accurate internal–external rotation measurement in total knee prostheses: A magnetic solution

Arami

Miehlbradt

Aminian

2012

Journal of Biomechanics

Self Cite

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“…Although tremendous advances have been made in musculoskeletal biomechanics, potential breakthroughs are hindered by limitations in acquiring reliable in vivo measurements such as joint contact forces and soft tissue deformations [7,8]. While hip and knee joint contact forces have been measured using instrumented implants [9][10][11], these devices are typically implanted in older patients, and the motions collected are limited to relatively slow motions such as gait, stair climbing, and slow jogging. In addition, the behavior may not be representative of what happens in a native joint since geometries and material properties have been altered.…”

Section: Introductionmentioning

confidence: 99%

A Reconfigurable Multiplanar In Vitro Simulator for Real-Time Absolute Motion With External and Musculotendon Forces

Green

Hale

Hausselle

et al. 2017

Journal of Biomechanical Engineering

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Advancements in computational musculoskeletal biomechanics are constrained by a lack of experimental measurement under real-time physiological loading conditions. This paper presents the design, configuration, capabilities, accuracy, and repeatability of The University of Texas at El Paso Joint Load Simulator (UTJLS) by testing four cadaver knee specimens with 47 real-time tests including heel and toe squat maneuvers with and without musculotendon forces. The UTJLS is a musculoskeletal simulator consisting of two robotic manipulators and eight musculotendon actuators. Sensors include eight tension load cells, two force/torque systems, nine absolute encoders, and eight incremental encoders. A custom control system determines command output for position, force, and hybrid control and collects data at 2000 Hz. Controller configuration performed forward-dynamic control for all knee degrees-of-freedom (DOFs) except knee flexion. Actuator placement and specimen potting techniques uniquely replicate muscle paths. Accuracy and repeatability standard deviations across specimen during squat simulations were equal or less than 8 N and 5 N for musculotendon actuators, 30 N and 13 N for ground reaction forces (GRFs), and 4.4 N·m and 1.9 N·m for ground reaction moments. The UTJLS is the first of its design type. Controller flexibility and physical design support axis constraints to match traditional testing rigs, absolute motion, and synchronous real-time simulation of multiplanar kinematics, GRFs, and musculotendon forces. System DOFs, range of motion, and speed support future testing of faster maneuvers, various joints, and kinetic chains of two connected joints.

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“…The most probable cause of premature implant failure is aseptic loosening, which is a severe physiological response to foreign debris in the joint. This debris is generated from abrasive wear in the ultra-high molecular weight polyethylene (UHMWPE) of the tibial insert, due to malpositioning of the articular surfaces and the high forces acting in the joint [3], [4]. Therefore, effective monitoring of the active stresses within the UHMWPE insert can provide a clearer perception of knee biomechanics, and provide real-time observation on the condition of the knee implant.…”

Section: Introductionmentioning

confidence: 99%

Non-Invasive Measurement of Stress Levels in Knee Implants Using a Magnetic-Based Detection Method

2016

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A knee replacement surgery (arthroplasty) has become prevalent worldwide and has a high success rate over the short to medium term. In some cases, especially over the longer term, implant degradation can develop due to the deterioration of the ultra-high molecular weight polyethylene (UHMWPE) tibial insert. Unfortunately, there are no satisfactory techniques currently available for assessing implant integrity and predicting failure. This paper describes a possible solution to this problem by using a non-invasive, electromagnetic method for monitoring implant integrity. This approach utilizes the magnetoelastic property of amorphous ribbon, which when stressed causes an inductance change in a nearby magnetizing winding. Amorphous ribbons encased in UHMWPE disks, to simulate a knee insert, were subjected to varying tensile stresses under an applied ac magnetic field. A correlation between total circuit impedance and applied stress was observed. The results obtained demonstrate that the proposed sensor has sufficient sensitivity for measuring typical stress levels associated with the axial forces in tibial inserts.

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Instrumented prosthesis for knee implants monitoring

Cited by 15 publications

References 15 publications

Accurate internal–external rotation measurement in total knee prostheses: A magnetic solution

Accurate internal–external rotation measurement in total knee prostheses: A magnetic solution

A Reconfigurable Multiplanar In Vitro Simulator for Real-Time Absolute Motion With External and Musculotendon Forces

Non-Invasive Measurement of Stress Levels in Knee Implants Using a Magnetic-Based Detection Method

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